My idea is, like many ideas, designated currently as SCP-XXXX. SCP-XXXX is a pathogen (though it is yet to be identified, as it appears invisible through microscopes and heat detecting technology) which affects all materials, including human skin, paper, etc. What it does is alters any information etched, written, carved, etc., onto it; for example, if you wrote 'I love you' on a piece of paper, it could change it to 'I hate you', or 'We love you', or 'I love him'. SCP-XXXX usually takes several hours to change even a single word, and the time taken increases with the amount of characters in it. Even when the information is written with a medium that would be difficult or even impossible to change - such as a knife on rock or skin - SCP-XXXX can change words with no sign of the previous word.

It's classed as Euclid, mostly due to the danger it presents if it affects, say, an SCP object file, and alters its containment procedures, or its test logs. Though it can easily be contained and destroyed, it presents a security hazard if it is not detected.

Is this idea worth doing, or not?

EDIT: Though SCP-XXXX is easily contained and destroyed, it is incredibly hard to detect due to the lack of equipment that is able to detect it. This means that manual labour - ideally by using D-class personnel - is needed to find documents and other important pieces of information that are infected with SCP-XXXX. And due to the relatively common mistakes due to human error that allow materials infected with SCP-XXXX to slip by, it is almost impossible to eradicate fully.

No SCPs that I know of are like this. It's a bit interesting, but if it's so easy to contain and/or destroy (BTW the slogan is Secure Contain Protect, not Destroy Destroy Destroy. Sorry if that seemed rude), then why not make it safe?

Yeah, I think I may need to rewrite that part. I didn't mean that it's supposed to be destroyed, rather that it's easily done. Also, it's easy to contain, but only when it has been detected; before it is detected, it can cause containment issues if it affects material information, like I said. Also, as it is yet to be identified, there is no clear way to identify information 'infected' by SCP-XXXX other than having someone manually check through it, and even then cases can slip through the cracks of human error.

Granted, it was stuff that I failed to mention in the original post, so I'll make an edit to it. Thanks for the feedback.